The most interesting part of this research is yet to come, in the form of a record of the mature performances of these gifted persons observed in childhood. However, I propose to make a report now of origin and development; to be followed, if I live so long, by further reports of adult status. Such researches require more than the life span of one investigator, since time is of the essence of the task. Universities should make provision for institutional prosecution of these long-time studies as distinguished from individual prosecution. In any case, I shall try to leave the records to some younger student who will comprehend them, and who will amplify them if I prove unable to do so myself. Galton, in his efforts to understand ability, was limited to the study of the eminent adult, dead and gone. The only test he could use was that of reputation, for at the time he was at work on the problem, mental measurement had not yet been developed as a technique. He wished for a more valid method of gauging ability, and he fully realized that it would be of greater advantage to study "the living individual." "Is reputation a fair test of natural ability?" he asked. "It is the only one I can employ . . . am I justified in using it? How much of a man's success is due to his opportunities, and how much to his natural power of intellect?" Galton's work was finished before Binet's studies made it possible to measure natural ability apart from reputation; and what is most essential of all, to measure _natural ability in childhood_. It was Binet's great and original service that he rendered it possible to determine accurately the permanent intellectual caliber of an undeveloped human being. It has always been possible to appraise the ability of people forty or fifty years old, after they have met "the tests of life," but for the pursuit of education and social science it is not very practically useful to know what a person is like only at the end of his life. It is essential, rather, to know with a high degree of precision and certainty the mental endowment of persons at the beginning of their lives if anything is to be done in the matter of special training for special children.